The influence of helium ion irradiation on amorphous hydrocarbon films

2013 ◽  
Vol 435 (1-3) ◽  
pp. 214-221 ◽  
Author(s):  
Hongyu Fan ◽  
Li Sun ◽  
Deming Yang ◽  
Jinhai Niu ◽  
Liping Guo ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Hydrocarbon Films ◽  
Helium Ion

Magnetization dynamics of irradiation-fabricated perpendicularly magnetized dots inside a softer magnetic matrix

2003 ◽  
Vol 777 ◽  
Author(s):  
T. Devolder ◽  
M. Belmeguenai ◽  
C. Chappert ◽  
H. Bernas ◽  
Y. Suzuki
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Ion Irradiation ◽  
Magnetic Nanostructures ◽  
Magnetic Storage ◽  
Exchange Field ◽  
Static Magnetization ◽  
Specific Domain ◽  
Helium Ion

AbstractGlobal Helium ion irradiation can tune the magnetic properties of thin films, notably their magneto-crystalline anisotropy. Helium ion irradiation through nanofabricated masks can been used to produce sub-micron planar magnetic nanostructures of various types. Among these, perpendicularly magnetized dots in a matrix of weaker magnetic anisotropy are of special interest because their quasi-static magnetization reversal is nucleation-free and proceeds by a very specific domain wall injection from the magnetically “soft” matrix, which acts as a domain wall reservoir for the “hard” dot. This guarantees a remarkably weak coercivity dispersion. This new type of irradiation-fabricated magnetic device can also be designed to achieve high magnetic switching speeds, typically below 100 ps at a moderate applied field cost. The speed is obtained through the use of a very high effective magnetic field, and high resulting precession frequencies. During magnetization reversal, the effective field incorporates a significant exchange field, storing energy in the form of a domain wall surrounding a high magnetic anisotropy nanostructure's region of interest. The exchange field accelerates the reversal and lowers the cost in reversal field. Promising applications to magnetic storage are anticipated.

Self-organized nanostructure formation on the graphite surface induced by helium ion irradiation

2018 ◽  
Vol 382 (24) ◽  
pp. 1601-1608 ◽  
Author(s):  
N.J. Dutta ◽  
S.R. Mohanty ◽  
N. Buzarbaruah ◽  
M. Ranjan ◽  
R.S. Rawat
Keyword(s):  
Ion Irradiation ◽  
Graphite Surface ◽  
Nanostructure Formation ◽  
Self Organized ◽  
Helium Ion

Irradiation damage and mechanical properties in Fe-Au and Fe-Cu model alloys under helium ion irradiation

2020 ◽  
Vol 504 ◽  
pp. 144383 ◽  
Author(s):  
Shasha Zhang ◽  
Zhengjun Yao ◽  
Zhaokuan Zhang ◽  
Moliar Oleksandr
Keyword(s):  
Mechanical Properties ◽  
Ion Irradiation ◽  
Irradiation Damage ◽  
Helium Ion

Structural response of transient heat loading on a molybdenum surface exposed to low-energy helium ion irradiation

2016 ◽  
Vol 56 (3) ◽  
pp. 036005 ◽  
Author(s):  
G. Sinclair ◽  
J.K. Tripathi ◽  
P.K. Diwakar ◽  
A. Hassanein
Keyword(s):  
Ion Irradiation ◽  
Structural Response ◽  
Low Energy ◽  
Helium Ion ◽  
Heat Loading
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